EFFECT FROM THE ACADEMIC YEAR 2013 - 2014

ME 402

METROLOGY AND INSTRUMENTATION

Instruction                                                                                                                                                                                                                                                                           4  Periods per week

Duration of University Examination                                                                                                                                                                                                                                   3   Hours

University Examination                                                                                                                                                                                                                                                      75  Marks

Sessional                                                                                                                                                                                                                                                                             25  Marks

Unit-I

Limits and Fits, ISO system: Fits and Types of interchangeability, Taylor’s Principle or plain limit gauges, Use of Plug, Ring and Snap gauges. Indicating type limit gauges. Introduction- Linear and

Angular measurements - Slip gauges and End bars - Gauge material and manufacturing methods, Different types of Micrometers, Height gauges, Tomlinson gauges. Precision polygon, Sine bar,

Auto collimator,.

Unit-II

Comparators: Dial indicator, Sigma and Mechanical comparator, Free flow and Back pressure type Pneumatic comparator. Application of set jet gauge heads

Optical projector, Chart, screen gauges and measuring methods, Micro gauge bridge lines. Tool maker’s Microscope applications,. Measurement of Straightness and- Flatness. Roundness measurement with bench centers and talyround, Coordinate Measuring Machine in components geometries.

Unit-Ill

Surface Roughness Measurements –parameters as per ISO indices. Profilometer, Taylor Hobson Talysurf. Application of Thread metrology - 2 wire and 3 Wire methods, Gear measurement - Gear tooth thickness, Parkinson gear tester, General geometric tests for testing machine tools-Lathe, drill, mill.

Unit-IV

Elements of instrumentation system. Static and Dynamic characteristics. Types of errors. Displacement transducers. LVDT. Strain measurement - Wire and foil type resistance strain gauges. Rosette

Gauges. Bonding procedure. Lead resistance compensation. Adjacent arm and self compensating gauges. Proving ring Strain gauge load cells, measurement of axial load and torsion by strain

gauges. Piezo electric load cell.

Unit-V

Introduction to Seismic Transducers - displacement and acceleration measurement, Pressure measurement - Bourdon pressure gauge, bulk modulus gauge, pirani gauge, Temperature measurement by thermo couples. Laws of thermo electricity. Types of materials used in thermocouples. Protection tubes Extension wire. Series and parallel circuits. Ambient temperature compensation.

Suggested Reading:

 1.I C Gupta, Engineering Metrology, Danpat Rai Publications, New Delhi.

 2.Rega Rajendra, Principles of Engineering Metrology, Jaico Publishing House, Mumbai.

 3.V S R Murti, Metrology and Surface Engineering, Frontline Publications, 2011

 4.R.K Jain, Engineering Metrology, Khanna Publications, 1996

 5.Doeblin, Measurement Systems Application and Design, Tata McGraw Hill, 5thed., 2004.

 6.Beckwith, Buck, Lienhard, Mechanical Measurements, Pearson Education Asia.